Kubernetes integration with OpenStack networking
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# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import threading
from openstack import exceptions as o_exc
from oslo_config import cfg
from oslo_log import log as logging
from kuryr_kubernetes import clients
from kuryr_kubernetes import config as kuryr_config
from kuryr_kubernetes.controller.drivers import nested_vif
from kuryr_kubernetes.controller.drivers import utils
from kuryr_kubernetes import exceptions as k_exc
from kuryr_kubernetes import os_vif_util as ovu
LOG = logging.getLogger(__name__)
CONF = cfg.CONF
class NestedMacvlanPodVIFDriver(nested_vif.NestedPodVIFDriver):
"""Manages ports for nested-containers using MACVLAN to provide VIFs."""
def __init__(self):
self.lock = threading.Lock()
def request_vif(self, pod, project_id, subnets, security_groups):
os_net = clients.get_network_client()
req = self._get_port_request(pod, project_id, subnets,
security_groups)
attempts = kuryr_config.CONF.pod_vif_nested.rev_update_attempts
container_port = None
while attempts > 0:
vm_port = self._get_parent_port(pod)
if not container_port:
container_port = os_net.create_port(**req)
self._check_port_binding([container_port])
if not self._tag_on_creation:
utils.tag_neutron_resources([container_port])
container_mac = container_port.mac_address
container_ips = frozenset(entry['ip_address'] for entry in
container_port.fixed_ips)
attempts = self._try_update_port(
attempts, self._add_to_allowed_address_pairs, vm_port,
container_ips, container_mac)
return ovu.neutron_to_osvif_vif_nested_macvlan(container_port, subnets)
def request_vifs(self, pod, project_id, subnets, security_groups,
num_ports):
# TODO(mchiappe): provide an implementation
raise NotImplementedError()
def release_vif(self, pod, vif, project_id=None, security_groups=None):
os_net = clients.get_network_client()
attempts = kuryr_config.CONF.pod_vif_nested.rev_update_attempts
while attempts > 0:
container_port = os_net.get_port(vif.id)
container_mac = container_port.mac_address
container_ips = frozenset(entry['ip_address'] for entry in
container_port.fixed_ips)
vm_port = self._get_parent_port(pod)
attempts = self._try_update_port(
attempts, self._remove_from_allowed_address_pairs,
vm_port, container_ips, container_mac)
try:
os_net.delete_port(vif.id, ignore_missing=False)
except o_exc.ResourceNotFound:
LOG.warning("Unable to release port %s as it no longer exists.",
vif.id)
def activate_vif(self, vif, **kwargs):
# NOTE(mchiappe): there is no way to get feedback on the actual
# interface creation or activation as no plugging can happen for this
# interface type. However the status of the port is not relevant as
# it is used for IPAM purposes only, thus just set 'active'
# immediately to let the CNI driver make progress.
vif.active = True
def _add_to_allowed_address_pairs(self, port, ip_addresses,
mac_address=None):
if not ip_addresses:
raise k_exc.IntegrityError(
"Cannot add pair from the "
"allowed_address_pairs of port %s: missing IP address" %
port.id)
mac = mac_address if mac_address else port.mac_address
address_pairs = port.allowed_address_pairs
# look for duplicates or near-matches
for pair in address_pairs:
if pair['ip_address'] in ip_addresses:
if pair['mac_address'] is mac:
raise k_exc.AllowedAddressAlreadyPresent(
"Pair %s already "
"present in the 'allowed_address_pair' list. This is "
"due to a misconfiguration or a bug" % str(pair))
else:
LOG.warning(
"A pair with IP %s but different MAC address "
"is already present in the 'allowed_address_pair'. "
"This could indicate a misconfiguration or a "
"bug", pair['ip_address'])
for ip in ip_addresses:
address_pairs.append({'ip_address': ip, 'mac_address': mac})
self._update_port_address_pairs(
port.id, address_pairs,
revision_number=port.revision_number)
LOG.debug("Added allowed_address_pair %s %s" %
(str(ip_addresses,), mac_address))
def _remove_from_allowed_address_pairs(self, port, ip_addresses,
mac_address=None):
if not ip_addresses:
raise k_exc.IntegrityError(
"Cannot remove pair from the "
"allowed_address_pairs of port %s: missing IP address" %
port.id)
mac = mac_address if mac_address else port.mac_address
address_pairs = port.allowed_address_pairs
updated = False
for ip in ip_addresses:
try:
address_pairs.remove({'ip_address': ip, 'mac_address': mac})
updated = True
except ValueError:
LOG.error("No {'ip_address': %s, 'mac_address': %s} pair "
"found in the 'allowed_address_pair' list while "
"trying to remove it.", ip, mac)
if updated:
self._update_port_address_pairs(
port.id,
address_pairs,
revision_number=port.revision_number)
def _update_port_address_pairs(self, port_id, address_pairs,
revision_number=None):
os_net = clients.get_network_client()
os_net.update_port(port_id, allowed_address_pairs=address_pairs,
if_match=f'revision_number={revision_number}')
def _try_update_port(self, attempts, f,
vm_port, container_ips, container_mac):
try:
with self.lock:
f(vm_port, container_ips, container_mac)
attempts = 0
except o_exc.SDKException:
attempts -= 1
if attempts == 0:
LOG.exception("Error happened during updating port %s",
vm_port['id'] if vm_port else None)
raise
return attempts